pressurizing crankcase

[FryBird]

earlier I posted about my 1987 300SLD shooting oil like a geyser from the oil dipstick hole on High RPMs 4000+, and I am still trying to figure out where all the blowby is coming from I did two more compression checks ( using the injector opening as opposed to the glowplug opening from last time). and I only did 10 cranks not 12 cranks like last time.
I did a warm and cold comparison. I let the car cool down overnight and connected a battery charger to make sure it wasn't drained from the previous test.

here are the #s from front to back Warm, 450,425,440,430,430,450
and the Cold cranking 460,410,440,375,375,440
remeber the battery was fully charged on the cold crank so dont be alarmed on the first cylinder actually being higher.

so for a car with about 200,000 miles it seems tight as it can NOT be Rings ??
maybe head gasket, or valve guides..but could they cause Olde faithful from the dipstick hole?

I do notice during strong driving Oil weeping out of the small holes in both the dipstick tube and the Valve cover ( small hole back left side).

I put a crankcase breather on the hose going from the valve cover to the turbo inlet, but still getting oil seepage out of the holes.

I guess its more pressure build up than the small diameter J-shaped tube in the valve cover can handle?

its just a mystery. just scratching my head..and keep adding Oil to replace the oil weeping out. ( and smelling the fumes burning off the hot engine)

maybe replace the 10W40 motor oil with 20W50 will prevent the blowby?
thanks for all your help.
Mark